Feat/137 event caching

[minjun3021]

What is this PR?

• Github Issue:
  이벤트 페이지 조회 캐싱 #137

Key Changes

Test Checklist

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #140   +/-   ##
=======================================
  Coverage        ?   80.94%           
  Complexity      ?      142           
=======================================
  Files           ?       44           
  Lines           ?      761           
  Branches        ?       31           
=======================================
  Hits            ?      616           
  Misses          ?      122           
  Partials        ?       23           

Files	Coverage Δ
...p4/ticketingservice/TicketingserviceApplication.kt	50.00% <ø> (ø)
...up4/ticketingservice/controller/EventController.kt	100.00% <ø> (ø)
.../com/group4/ticketingservice/config/CacheConfig.kt	0.00% <0.00%> (ø)

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